Cutting by use of rotating axially moving tool – Tool or tool with support – Having peripherally spaced cutting edges
Reexamination Certificate
2005-08-02
2005-08-02
Howell, Daniel W. (Department: 3722)
Cutting by use of rotating axially moving tool
Tool or tool with support
Having peripherally spaced cutting edges
C451S048000, C076S108600
Reexamination Certificate
active
06923602
ABSTRACT:
A drill including a shank portion and a cylindrical body portion contiguous to each other. The cylindrical body portion includes (a) primary cutting edges and secondary cutting edges formed in its axially distal end portion such that each of the secondary cutting edges is located on a radially inner side of the corresponding primary cutting edge; (b) primary rake surfaces of the primary cutting edges and secondary rake surfaces of the secondary cutting edges; and (c) inclined surfaces each of which extends from the corresponding secondary rake surface to a periphery of the cylindrical body portion, and is inclined such that an axial distance between each of the inclined surfaces and the shank portion is reduced as viewed in a direction substantially perpendicular to the corresponding secondary cutting edge, from the corresponding secondary rake surface toward the periphery of the cylindrical body portion. Each of the secondary rake surfaces and the corresponding secondary cutting edge are formed together with each other in a web thinning. Each of the secondary rake surfaces and the corresponding inclined surface are connected to each other without a step therebetween.
REFERENCES:
patent: 4116580 (1978-09-01), Hall et al.
patent: 4583888 (1986-04-01), Mori et al.
patent: 4602900 (1986-07-01), Arpaio et al.
patent: 4744705 (1988-05-01), Imanaga
patent: 5011342 (1991-04-01), Hsu
patent: 5231802 (1993-08-01), Hosoi
patent: 5433655 (1995-07-01), Shiokawa et al.
patent: 5486075 (1996-01-01), Nakamura et al.
patent: 6071046 (2000-06-01), Hecht et al.
patent: 6315504 (2001-11-01), Sekiguchi et al.
patent: 6419561 (2002-07-01), George
patent: 6585460 (2003-07-01), Meece et al.
patent: 2003/0053873 (2003-03-01), Shaffer
patent: 3927615 (1991-02-01), None
patent: 0 681 882 (1995-11-01), None
patent: 56-33214 (1981-04-01), None
patent: A 57-132908 (1982-08-01), None
patent: U 60-17912 (1985-02-01), None
patent: U 61-89415 (1986-06-01), None
patent: B2 5-32164 (1993-05-01), None
patent: A 5-138421 (1993-06-01), None
patent: A 5-220611 (1993-08-01), None
patent: A 7-237017 (1995-09-01), None
patent: A 7-308814 (1995-11-01), None
patent: A 8-39318 (1996-02-01), None
patent: A 11-267912 (1999-10-01), None
patent: A 11-333611 (1999-12-01), None
patent: A 2001-96412 (2001-04-01), None
patent: A 2001-96413 (2001-04-01), None
Kasuya Kazuhisa
Kobayashi Kenjiro
Osawa Jiro
Takikawa Yoshihiro
Yamamoto Takahiro
Howell Daniel W.
OGO Corporation
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